🌐 Reverse ASN Lookup

Find all domains hosted on this ASN

Every .dk domain whose website address (A record) is announced by AS21101, with the network's IPv6 and DNSSEC adoption and its observed prefixes. An autonomous system is the routing identity of a hosting company or ISP. Data comes from our own scanners, which re-resolve every .dk domain in the zone roughly once a week.

📈 Domains over time#

Not enough history to chart yet — this series is collected once a day. Check back tomorrow.

🛰️ Upstream providers of AS21101#

via ipbot.dk

SISTEMIUNO-AS Sistemi Hardware&Software S.P.A. announces 20 prefixes (20 IPv4, 0 IPv6) and reaches the internet through 10 upstream networks.

UpstreamNamePower
AS41327Fiber Telecom S.p.A.
100.0%
AS12779IT.Gate S.p.A.
27.2%
AS6939Hurricane Electric LLC
6.3%
AS14840BR.Digital Telecom
1.6%
AS3303Swisscom (Schweiz) AG
1.6%
AS34019Hivane Association
1.6%
AS6057Administracion Nacional de Telecomunicaciones
1.6%
AS8298IPng Networks GmbH
1.3%
AS24961MYLOC-AS WIIT AG
1.1%
AS34177Celeste SAS
1.1%

Upstream and prefix data supplied by ipbot.dk; power is relative to the strongest upstream.

Found 0 domains matching 21101
🔍
No results found in the database.

🧭 Nameservers in this AS#

1 host
HostnameDomains
ns01.unonet.it 2

📮 Mail Exchangers in this AS#

1 host
HostnameDomains
etrn.unonet.it 2
dhd.dk [/] search Domains, Hosts & DNS — .dk zone